Summary
Within the retinal nerve fiber layer of a 6-week-old Sprague-Dawley rat, scattered aggregates of PNS myelinated axons have been found and described. We believe this is likely to represent a normal but rare phenomenon in the rat.
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Jung, H.J., Raine, C.S. & Suzuki, K. Schwann cells and peripheral nervous system myelin in the rat retina. Acta Neuropathol 44, 245–247 (1978). https://doi.org/10.1007/BF00691075
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DOI: https://doi.org/10.1007/BF00691075